In article ,
Cursitor Doom wrote:
On Mon, 25 May 2015 12:40:31 +0100, charles wrote:

If you've got a properly installed aerial, then your "little
transmitter"
is the wrong side of the tin box (known as the car body).

But it will be physically so close to the radio/cassette unit it won't
need to rely on any antenna; it will couple straight through to the
unit's PCB's RF input stage via induction.

depends on how well screened the radio is. Most that I've seen are in
totally enclosed metal case - except where the control wiring exits

--
From KT24 in Surrey

Using a RISC OS computer running v5.18